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How much power do i need?

Last response: in Graphics & Displays
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January 25, 2012 4:00:01 AM

i am going to crossfire 2 5750s. How much power do i need?

More about : power

January 25, 2012 4:17:35 AM

Copy paste from AMD's website.

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


So 600W
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a c 109 U Graphics card
January 25, 2012 4:18:39 AM

A quality 500w unit. Corsair cx500w is a great cheap unit.
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a b U Graphics card
January 25, 2012 4:38:30 AM

This one will also do it, and allow for a little upgrade room should you decide on higher end cards. Mine has been stellar so far(3 months), and it just happens to be a great deal right now with the rebate which I had no trouble getting. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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January 25, 2012 5:05:46 AM

i have like a 100 watt cpu that i am going to be getting though. thanks though,
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a c 109 U Graphics card
January 25, 2012 5:37:04 AM

A 500w unit.
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a c 255 U Graphics card
January 25, 2012 6:24:41 AM

AxemanACL said:
Copy paste from AMD's website.

450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for ATI CrossFireX™ technology in dual mode)


So 600W



^ This is straight from the AMD site.


I would NOT use a 500w PSU with 600w being recommended. That would be a generic 600 watt unit but I would not risk a 500w unit as was recommended above. Also that OCZ linked to is a decent power supply but you can do better for the same money.

http://www.eggxpert.com/forums/thread/323050.aspx

Try this.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...





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a b U Graphics card
January 25, 2012 7:23:18 AM

A good 500 watt PSU will do nicely. A pair of 5750's will pull about 150 watts (12 - 13 amps) at load.

One of my systems has an OC'd Q9550, 4 GB RAM, a GTX260 - a card with similar power requirements to two 5750's, a Gigabyte EP45-UD3P motherboard, 3 hard drives (2.6 TB total)and an optical, and a Soundblaster card all powered by a Corsair 750TX.

Running 3 instances of Prime95 to load the CPU and 3DMark06 to load the GPU, it pulls 375 watts from the wall as measured by my Kill-a-Watt meter. Figuring 80% PSU efficiency, the system pulls 300 watts from the PSU.
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a b U Graphics card
January 25, 2012 1:01:13 PM

Scroll down the page to the power consumption section. These guys are using a 130W cpu and they have it overclocked so it is drawing more than that. With crossfire 5750's they measured a peak of 425W. Though they do recommend a 600W power supply(the same as AMD). Things will probably work just fine with a quality 500W so if you have one already then stick with it. If not, then just get what AMD recommends.

http://www.guru3d.com/article/radeon-hd-5750-review-cro...
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January 25, 2012 1:15:36 PM

so then 600w should work fine 400-500w for the gpus, and 100w for the cpu.

ill probably try to get a around a 675w psu so i have extra room in case i want to overclock.
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a b U Graphics card
January 25, 2012 1:25:59 PM

A little headroom is always nice and I would get ,at the minimum, what the manufacturer recommends.
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January 25, 2012 9:52:50 PM

Best answer selected by baller43.
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a c 271 U Graphics card
January 25, 2012 10:46:38 PM

This topic has been closed by Mousemonkey
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